Diagnosis of Rolling Bearing by Measuring Time Interval of AE Generation

[+] Author and Article Information
Takeo Yoshioka, Atsushi Korenaga

Machine Elements Division, Mechanical Engineering Laboratory, Ministry of International Trade and Industry, 1-2, Namiki, Tsukuba, Ibaraki, 305-8564, Japan

Hiroki Mano, Takashi Yamamoto

Department of Mechanical System Engineering, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo, 184-0012, Japan

J. Tribol 121(3), 468-472 (Jul 01, 1999) (5 pages) doi:10.1115/1.2834091 History: Received January 21, 1998; Revised July 05, 1998; Online January 24, 2008


We have developed a new method for measuring time intervals of Acoustic Emission (AE) generation for diagnosis of a radial rolling bearing. The method makes the AE signal itself a trigger of the oscillation of the clock pulse and measures the time interval of AE generation by integration of the clock pulses. The measurement device consists of the threshold, clock, time interval measurement and memory circuit, and was applied to rolling contact fatigue experiments. It was confirmed by the experiments that the measured time intervals of AE generation on the inner raceway or the ball agreed with the value calculated based on the kinetics of the rolling bearing. Moreover, we could identify the elements in which a fatigue crack was propagating by the method before the spalling appeared. The identified elements agreed with the failed elements.

Copyright © 1999 by Journal of Tribology
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